Individual muscle fiber Connective tissue burrounding muscle fiber bundies Connective tissue sheath surrounding individual musielibera Bundle of muscle cells murrounded by a perimtium Connective is covering the exterior olmusde organ
The Correct Answer and Explanation is :
The terms in the question are related to the structure of skeletal muscles. Here’s the correct answer based on the description:
- Individual muscle fiber: This refers to a single muscle cell.
- Connective tissue surrounding muscle fiber bundles: Perimysium.
- Connective tissue sheath surrounding individual muscle fibers: Endomysium.
- Bundle of muscle cells surrounded by perimysium: Fascicle.
- Connective tissue covering the exterior of the muscle organ: Epimysium.
Explanation:
Skeletal muscles are composed of multiple levels of organization, each encased in connective tissue that provides support, protection, and structure.
- Muscle Fiber:
- A single muscle fiber is an elongated, cylindrical cell containing contractile proteins like actin and myosin. Muscle fibers are the basic functional units responsible for muscle contraction.
- Endomysium:
- Surrounding each muscle fiber is a thin layer of connective tissue called the endomysium. This layer provides electrical insulation and a supportive framework for capillaries and nerves.
- Fascicle:
- Muscle fibers are grouped into bundles called fascicles. This bundling allows muscles to function as a cohesive unit while enabling flexibility and strength.
- Perimysium:
- Each fascicle is surrounded by a connective tissue layer called the perimysium. This layer organizes muscle fibers into compartments and provides pathways for blood vessels and nerves to reach individual fibers.
- Epimysium:
- The entire muscle organ is surrounded by a tough connective tissue sheath known as the epimysium. This layer protects the muscle, maintains its shape, and connects it to tendons, which attach muscles to bones.
This hierarchical structure ensures that muscles can contract efficiently, resist injury, and maintain their integrity during movement.